Enter a species  (e.g. Al, Fe): Ba
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Ba__MO_143487634619_003
Enter hexagonal lattice constants 'a' and 'c' (m): 4.550386209228604e-10, 7.394245155718234e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -3.244551
         Iterations: 71
         Function evaluations: 186

Finished calculation

C11 = 19.040410783011602 GPa
C12 = 4.773494868420025 GPa
  B = 9.529133506617217 GPa